Sorry, I only got to see the first loaderbar (guess my keyboard isn't that well designed for smashing space, and I don't want to aggrevate carpal tunnel by trying 50 times). So since the only thing I got to see was a thumb down, that is what this 'demo' gets from me.

Great concept, well done. imho tunnel was the easiest part. Loading Bar was easy, too. Hardest was image revealing with mouse. Oh and everybody with a non-english keyboard (eg. german as in my case) should still be able to hit the right keys (protip: try typing complete words).. Now all I need to find is the hidden part. Any hints?